## SiYuan: A parser differential between the WebSocket keepalive exemption and the session quarantine allows unauthenticated access to the broadcast event stream

- 種別: advisory
- 重大度: high
- 関連技術: go, github
- CVE: CVE-2026-73054
- 公開日時: 2026-10-23T18:34:09.000Z
- 情報源: GitHub Advisory Database (https://github.com/advisories/GHSA-c8w8-3pqp-wr83)
- パーマリンク: https://vulnpulse.app/items/ghsa-ghsa-c8w8-3pqp-wr83

影響: go:github.com/siyuan-note/siyuan/kernel < 0.0.0-20260731131820-67bc300b6ea6 → 0.0.0-20260731131820-67bc300b6ea6
Two checks on the same WebSocket request URI parse it differently. The authentication exemption for keepalive sessions matches raw substrings, while the quarantine introduced to contain those sessions reads a parsed query parameter. Because Go's url.Values.Get returns only the first value for a repeated key, a single URI can satisfy the exemption and still resolve to a non-auth session identity. The result is that an unauthenticated remote caller connects to the kernel WebSocket with a valid ac…